/* Modern Login Page Styles */
:root {
    --primary-color: #4f46e5;
    --secondary-color: #7c3aed;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --dark-bg: #0f172a;
    --dark-surface: #1e293b;
    --dark-card: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--dark-bg);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Login Container */
.login-container {
    min-height: 100vh;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* Background */
.login-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient);
    z-index: -2;
}

.login-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
}

.login-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 40%, rgba(120, 119, 198, 0.3), transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.15), transparent 50%),
                radial-gradient(circle at 40% 80%, rgba(120, 119, 198, 0.15), transparent 50%);
    animation: backgroundFloat 20s ease-in-out infinite;
}

@keyframes backgroundFloat {
    0%, 100% { transform: translateX(0px) translateY(0px); }
    33% { transform: translateX(30px) translateY(-30px); }
    66% { transform: translateX(-20px) translateY(20px); }
}

/* Navigation */
.login-nav {
    position: relative;
    z-index: 10;
    padding: 1rem 0;
    background: rgba(15, 23, 42, 0.1);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
}

.login-nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.navbar-brand:hover {
    color: var(--text-primary);
    text-decoration: none;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: var(--text-primary);
    text-decoration: none;
}

/* Login Content */
.login-content {
    flex: 1;
    display: flex;
    align-items: center;
    padding: 2rem 0;
    position: relative;
    z-index: 10;
}

/* Login Card */
.login-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    animation: cardFloat 0.8s ease-out;
}

@keyframes cardFloat {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin: 0;
}

/* Form Styles */
.login-form {
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
}

.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    z-index: 2;
}

.form-control {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 0.875rem 1rem 0.875rem 2.75rem;
    color: var(--text-primary);
    font-size: 1rem;
    width: 100%;
    transition: all 0.3s ease;
}

.form-control:focus {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    color: var(--text-primary);
    outline: none;
}

.form-control::placeholder {
    color: var(--text-muted);
}

.password-toggle {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.password-toggle:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

/* Form Options */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.checkbox-wrapper {
    display: flex;
    align-items: center;
    cursor: pointer;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.checkbox-wrapper input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.checkmark {
    width: 18px;
    height: 18px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    margin-right: 0.5rem;
    position: relative;
    transition: all 0.3s ease;
}

.checkbox-wrapper:hover .checkmark {
    background: rgba(255, 255, 255, 0.1);
}

.checkbox-wrapper input:checked ~ .checkmark {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkmark::after {
    content: '';
    position: absolute;
    display: none;
    left: 5px;
    top: 2px;
    width: 5px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-wrapper input:checked ~ .checkmark::after {
    display: block;
}

.forgot-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.forgot-link:hover {
    color: var(--primary-color);
    text-decoration: none;
    opacity: 0.8;
}

/* Buttons */
.btn {
    border: none;
    border-radius: 12px;
    padding: 0.875rem 1.5rem;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    margin-bottom: 1rem;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(79, 70, 229, 0.3);
    color: white;
    text-decoration: none;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    text-decoration: none;
}

.btn-loading {
    display: none;
}

/* Divider */
.divider {
    text-align: center;
    margin: 1.5rem 0;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--glass-border);
}

.divider span {
    background: var(--glass-bg);
    color: var(--text-muted);
    padding: 0 1rem;
    font-size: 0.9rem;
    position: relative;
    z-index: 1;
}

/* Footer */
.login-footer {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--glass-border);
}

.login-footer p {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin: 0;
}

.login-footer a {
    color: var(--primary-color);
    text-decoration: none;
}

.login-footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .login-card {
        margin: 1rem;
        padding: 2rem 1.5rem;
    }
    
    .login-header h2 {
        font-size: 1.75rem;
    }
    
    .form-options {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }
    
    .forgot-link {
        text-align: center;
    }
}

@media (max-width: 576px) {
    .login-content {
        padding: 1rem 0;
    }
    
    .login-card {
        margin: 0.5rem;
        padding: 1.5rem 1rem;
        border-radius: 16px;
    }
    
    .login-header h2 {
        font-size: 1.5rem;
    }
    
    .login-nav .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
}

/* Loading Animation */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.fa-spin {
    animation: spin 1s linear infinite;
}

/* Form Validation Styles */
.form-control.error {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-control.success {
    border-color: var(--success-color);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

/* Accessibility */
.btn:focus,
.form-control:focus,
.checkbox-wrapper:focus-within {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --glass-bg: rgba(0, 0, 0, 0.8);
        --glass-border: rgba(255, 255, 255, 0.3);
        --border-color: rgba(255, 255, 255, 0.3);
    }
}